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  • Parsing XML feed into Ruby object using nokogiri?

    - by Galen King
    Hi all, I am pretty green with coding in Ruby but am trying to pull an XML feed into a Ruby object as follows (ignore the ugly code please): <% doc = Nokogiri::XML(open("http://api.workflowmax.com/job.api/current?apiKey=#{@feed.service.api_key}&accountKey=#{@feed.service.account_key}")) %> <% doc.xpath('//Jobs/Job').each do |node| %> <h2><%= node['name'].text %></h2> <p><%= node['description'].text %></p> <% end %> Basically I want to iterate through each Job and output the name, description etc. What am I missing? Many thanks, Galen

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  • Artistic aspects of UI?

    - by anon
    Consider a single button. At one extreme, we have a black OpenGL window, with: outline (in white) of a rectangle bitmap remdered font inside of it, saying "Ok" At the other extreme, we have Mac OS X, a button that is: well rounded has some gradient showing light effects on it nice antialiased "OK" soft shadow of some sort These two UIs present very very different user experiences. The former says "This is from the 80s" the latter says "this is professional". This is something I do not understand well as a programmer (and don't know where to learn about this). Does anyone know of a good technical resource for this? [I'd prefer things that draws upon psychology / perception literature to say why to do something rather than design books that just says "use color XYZ with a gradient of blah"]

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  • Android Context.bindService always returns false and ServiceConnection object is never triggered

    - by mosfet
    I have followed the Local Service example provided by Google, but my Context::bindService(...) always returns false and there is ServiceConnection::onServiceConnected is also never called. I understand that Context::bindService() returns immediately, but my ServiceConnection object is never triggered. I don't know if these apply My activity is running inside a tabHost and I was wondering if that can affect service binding in any way. The Service itself may have a problem, but I can call start service to the same service with the same Intent and it works as expected. Does anyone have experience with this? Please help me out. Thanks, P.S. I am targeting Android 1.6

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  • In a digital photo, how can I detect if a mountain is obscured by clouds?

    - by Gavin Brock
    The problem I have a collection of digital photos of a mountain in Japan. However the mountain is often obscured by clouds or fog. What techniques can I use to detect that the mountain is visible in the image? I am currently using Perl with the Imager module, but open to alternatives. All the images are taken from the exact same position - these are some samples. My naïve solution I started by taking several horizontal pixel samples of the mountain cone and comparing the brightness values to other samples from the sky. This worked well for differentiating good image 1 and bad image 2. However in the autumn it snowed and the mountain became brighter than the sky, like image 3, and my simple brightness test started to fail. Image 4 is an example of an edge case. I would classify this as a good image since some of the mountain is clearly visible. UPDATE 1 Thank you for the suggestions - I am happy you all vastly over-estimated my competence. Based on the answers, I have started trying the ImageMagick edge-detect transform, which gives me a much simpler image to analyze. convert sample.jpg -edge 1 edge.jpg I assume I should use some kind of masking to get rid of the trees and most of the clouds. Once I have the masked image, what is the best way to compare the similarity to a 'good' image? I guess the "compare" command suited for this job? How do I get a numeric 'similarity' value from this?

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  • SoundChannel object plays small portion after being stopped and played again

    - by gok
    SoundChannel object is stopped and played again. When played again it plays small portion from the previous position and suddenly jumps back to the beginning. It doesn't play the whole sound before looping. This happens only once, then it loops normally. It happens again if I stop and play. public function play():void { channel = clip.play(trimIn); volume(currentVolume); isPlaying = true; timer.start(); channel.addEventListener(Event.SOUND_COMPLETE, loopMusic); } public function loopMusic(e:Event=null):void { if (channel != null) { timer.stop(); channel.removeEventListener(Event.SOUND_COMPLETE, loopMusic); play(); } } Do I need to somehow reset the soundChannel?

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  • How to use json object notation to retrieve dbpedia json data

    - by Margi
    In my php code, I am retrieving json data as below. <?php $url = "http://dbpedia.org/data/Los_Angeles.json"; $data = file_get_contents($url); echo $data; ?> The javascript code consumes this json data returned from php and gets the json object as below. var doc = eval('(' + request.responseText + ')'); How to retrieve the following json data using dot notations. The keys contain URLs. "http://dbpedia.org/ontology/populationTotal" : [ { "type" : "literal", "value" : 3792621 , "datatype" : "http://www.w3.org/2001/XMLSchema#integer" } ] , "http://dbpedia.org/ontology/PopulatedPlace/areaTotal" : [ { "type" : "literal", "value" : "1301.9688931491348" , "datatype" : "http://dbpedia.org/datatype/squareKilometre" }

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  • e-shop implementation: Status for Orders?

    - by Guillermo
    Hello Again my fellow programmers out there, I'm designing and programming from scratch a online shop. It has a Module to manage "Orders" that are recieved via the frontend. I'm needing to have a status to know whats happening with an order in s certain moment, let's say the statuses are: Pending Payment Confirmed - Awaiting shipment Shipped Cancelled My question is a simple one, but is very important to decide on the store design, and is: What would you do so store this status: Would you create a column for it in the Orders table or would you just "calculate" the status of each order depending if payments has been recieved or shipments has been made for every order? (except I suppose for a is_cancelled column) What would be the best approach to model this kind of problem? PD: I even wish in the future to have these statuses configurable buy other clientes using the same software..

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  • Views performance in MySQL for denormalization

    - by Gianluca Bargelli
    I am currently writing my truly first PHP Application and i would like to know how to project/design/implement MySQL Views properly; In my particular case User data is spread across several tables (as a consequence of Database Normalization) and i was thinking to use a View to group data into one large table: CREATE VIEW `Users_Merged` ( name, surname, email, phone, role ) AS ( SELECT name, surname, email, phone, 'Customer' FROM `Customer` ) UNION ( SELECT name, surname, email, tel, 'Admin' FROM `Administrator` ) UNION ( SELECT name, surname, email, tel, 'Manager' FROM `manager` ); This way i can use the View's data from the PHP app easily but i don't really know how much this can affect performance. For example: SELECT * from `Users_Merged` WHERE role = 'Admin'; Is the right way to filter view's data or should i filter BEFORE creating the view itself? (I need this to have a list of users and the functionality to filter them by role). EDIT Specifically what i'm trying to obtain is Denormalization of three tables into one. Is my solution correct? See Denormalization on wikipedia

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  • In a digital photo, detecting if a mountain is obscured by clouds.

    - by Gavin Brock
    The problem I have a collection of digital photos of a mountain in Japan. However the mountain is often obscured by clouds or fog. What techniques can I use to detect that the mountain is visible in the image? I am currently using Perl with the Imager module, but open to alternatives. All the images are taken from the exact same position - these are some samples. My naïve solution I started by taking several horizontal pixel samples of the mountain cone and comparing the brightness values to other samples from the sky. This worked well for differentiating good image 1 and bad image 2. However in the autumn it snowed and the mountain became brighter than the sky, like image 3, and my simple brightness test started to fail. Image 4 is an example of an edge case. I would classify this as a good image since some of the mountain is clearly visible.

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  • How do you use the LINQ to SQL designer to generate accessor methods for subclasses?

    - by Pricey
    Above is the LINQ to SQL designer view for my data context. Below is the relevant code: public System.Data.Linq.Table<ActivityBase> ActivityBases { get { return this.GetTable<ActivityBase>(); } } ... [Table(Name="dbo.Activities")] [InheritanceMapping(Code="1", Type=typeof(ActivityBase), IsDefault=true)] [InheritanceMapping(Code="2", Type=typeof(Project))] [InheritanceMapping(Code="3", Type=typeof(ProjectActivity))] [InheritanceMapping(Code="5", Type=typeof(Task))] [InheritanceMapping(Code="4", Type=typeof(Activity))] public abstract partial class ActivityBase : INotifyPropertyChanging, INotifyPropertyChanged { ... Is there a way to generate accessor methods for the subclasses as shown in the inheritance mapping above (Project, Task, etc...) without doing it manually? I added them manually but then a change in the designer overwrites any manual changes. Am i doing this wrong? should I not be making accessors for the sub classes? filtering from ActivityBase seems worse to me. Thanks for any help on this.

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  • Entity Framework with ASP.NET MVC. Updating entity problem

    - by Kitaly
    Hi people. I'm trying to update an entity and its related entities as well. For instance, I have a class Car with a property Category and I want to change its Category. So, I have the following methods in the Controller: public ActionResult Edit(int id) { var categories = context.Categories.ToList(); ViewData["categories"] = new SelectList(categories, "Id", "Name"); var car = context.Cars.Where(c => c.Id == id).First(); return PartialView("Form", car); } [AcceptVerbs(HttpVerbs.Post)] public ActionResult Edit(Car car) { var category = context.Categories.Where(c => c.Id == car.Category.Id).First(); car.Category = category; context.UpdateCar(car); context.SaveChanges(); return RedirectToAction("Index"); } The UpdateCar method, in ObjectContext class, follows: public void UpdateCar(Car car) { var attachedCar = Cars.Where(c => c.Id == car.Id).First(); ApplyItemUpdates(attachedCar, car); } private void ApplyItemUpdates(EntityObject originalItem, EntityObject updatedItem) { try { ApplyPropertyChanges(originalItem.EntityKey.EntitySetName, updatedItem); ApplyReferencePropertyChanges(updatedItem, originalItem); } catch (InvalidOperationException ex) { Console.WriteLine(ex.ToString()); } } public void ApplyReferencePropertyChanges(IEntityWithRelationships newEntity, IEntityWithRelationships oldEntity) { foreach (var relatedEnd in oldEntity.RelationshipManager.GetAllRelatedEnds()) { var oldRef = relatedEnd as EntityReference; if (oldRef != null) { var newRef = newEntity.RelationshipManager.GetRelatedEnd(oldRef.RelationshipName, oldRef.TargetRoleName) as EntityReference; oldRef.EntityKey = newRef.EntityKey; } } } The problem is that when I set the Category property after the POST in my controller, the entity state changes to Added instead of remaining as Detached. How can I update one-to-one relationship with Entity Framework and ASP.NET MVC without setting all the properties, one by one like this post?

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  • Clear all class variables between instances

    - by ensnare
    This is probably a stupid question, but what's the best way to clear class variables between instances? I know I could reset each variable individually in the constructor; but is there a way to do this in bulk? Or am I doing something totally wrong that requires a different approach? Thanks for helping ... class User(): def __init__(self): #RESET ALL CLASS VARIABLES def commit(self): #Commit variables to database >>u = User() >>u.name = 'Jason' >>u.email = '[email protected]' >>u.commit() So that each time User is called the variables are fresh. Thanks.

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  • inner class within Interface

    - by harigm
    is that possible to create a inner class within an interface? If yes, why do we create like that? Anyways we are not going to create any interface objects? Do they help in any Development process?

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  • Pylons 1.0 AttributeError: 'module' object has no attribute 'metadata'

    - by shiki
    Python noob trying to learn Pylons. I'm using the QuickWiki tutorial (http://pylonshq.com/docs/en/1.0/tutorials/quickwiki_tutorial/) from the 1.0 documentation, but this alleged "1.0" doc seems to just be "0.9.7"; I suspect that this has something to do with the error I'm getting. When I execute "paster setup-app development.ini", I get this: (mydevenv)lucid@lucid-laptop:~/QuickWiki$ paster setup-app development.ini Traceback (most recent call last): ... edited for brevity... File "/home/lucid/mydevenv/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg/pkg_resources.py", line 1954, in load File "/home/lucid/QuickWiki/quickwiki/config/middleware.py", line 11, in <module> from quickwiki.config.environment import load_environment File "/home/lucid/QuickWiki/quickwiki/config/environment.py", line 12, in <module> from quickwiki.model import init_model File "/home/lucid/QuickWiki/quickwiki/model/__init__.py", line 27, in <module> pages_table = sa.Table('pages', meta.metadata, AttributeError: 'module' object has no attribute 'metadata' (mydevenv)lucid@lucid-laptop:~/QuickWiki$

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  • Doctrine does not export relation properly

    - by iggnition
    Hi, I've got a MySQL 5.1.41 database which i'm trying to fill with doctrine, but doctrine does not insert the relations correctly. My YAML is: Locatie: connection: doctrine tableName: locatie columns: loc_id: type: integer(4) fixed: false unsigned: false primary: true autoincrement: true org_id: type: integer(4) fixed: false unsigned: false primary: false notnull: false autoincrement: false naam: type: string(30) fixed: false unsigned: false primary: false notnull: true autoincrement: false straat: type: string(30) fixed: false unsigned: false primary: false notnull: true autoincrement: false huisnummer: type: integer(4) fixed: false unsigned: false primary: false notnull: true autoincrement: false huisnummer_achtervoegsel: type: string(3) fixed: false unsigned: false primary: false notnull: false autoincrement: false plaats: type: string(25) fixed: false unsigned: false primary: false notnull: true autoincrement: false postcode: type: string(6) fixed: false unsigned: false primary: false notnull: true autoincrement: false telefoon: type: string(12) fixed: false unsigned: false primary: false notnull: true autoincrement: false opmerking: type: string() fixed: false unsigned: false primary: false notnull: false autoincrement: false inloggegevens: type: string() fixed: false unsigned: false primary: false notnull: false autoincrement: false relations: Organisatie: local: org_id foreign: org_id type: one onDelete: CASCADE onUpdate: CASCADE Organisatie: connection: doctrine tableName: organisatie columns: org_id: type: integer(4) fixed: false unsigned: false primary: true autoincrement: true naam: type: string(30) fixed: false unsigned: false primary: false notnull: true autoincrement: false straat: type: string(30) fixed: false unsigned: false primary: false notnull: true autoincrement: false huisnummer: type: integer(4) fixed: false unsigned: false primary: false notnull: true autoincrement: false huisnummer_achtervoegsel: type: string(3) fixed: false unsigned: false primary: false notnull: false autoincrement: false plaats: type: string(25) fixed: false unsigned: false primary: false notnull: true autoincrement: false postcode: type: string(6) fixed: false unsigned: false primary: false notnull: true autoincrement: false telefoon: type: string(12) fixed: false unsigned: false primary: false notnull: true autoincrement: false opmerking: type: string(255) fixed: false unsigned: false primary: false notnull: false autoincrement: false relations: Locatie: local: org_id foreign: org_id type: many Now if a make an organisation and then create a location which has a foreignkey to organisation everything is fine. but when i try to update the org_id with phpmyadmin i get a contraint error. If i manually set the foreign key to ON_UPDATE CASCADE it does work. Why does doctrine not set this option? I got it to work in Propel, but i really want to use doctrine for this.

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  • read access violation error

    - by user293569
    class Node{ private: string name; Node** adjacent; int adjNum; public: Node(); Node(string, int adj_num); Node(const Node &); bool addAdjacent(const Node &); Node** getAdjacents(); string getName(); ~Node(); }; bool Node::addAdjacent(const Node &anode){ Node** temp; temp= new Node*[adjNum+1]; for(int i=0;i<adjNum+1;i++) temp[i]=adjacent[i]; temp[adjNum]=const_cast<Node *>(&anode); delete[] adjacent; adjacent=new Node*[adjNum+1]; adjacent=temp; delete[] temp; adjNum++; return true; } int main() { Node node1("A",0); Node node2("B",0); node1.getName(); node1.addAdjacent(node2); system("PAUSE"); return 0; } when the program comes to this part: for(int i=0;i<adjNum+1;i++) temp[i]=adjacent[i]; it says Access violation reading location 0xcccccccc. The class must allocate the memory fore adjacent, but I think it didn't how can I solve this problem?

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  • iphone: caching and updating xml fields

    - by pJosh
    Thanks for your help. Here I have another question. I get the data through XMLParsing, now I want to store it in iphone's cache, and the XML Fields are updates every 12 hours.how can i check that XML Fields are change or not? and how can I store the data in iphone's cache memory so that evry it does not has to interact with web. Can anybody please help me???

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  • Unbox an Object to Its Type

    - by Ngu Soon Hui
    Hello, is there anyway to unbox an object to its real type? Basically I am given an ArrayList, the array list are actually a list of int or double, or maybe other types ( it can be either, but it is either all int or double, no mix). Now, I will have to return a List<double> or List<int> or other list, depending on what is the real type. public List<T> ConvertToList<T>(ArrayList arr) { var list1 = new List<T>(); foreach(var obj in arr) { // how to do the conversion? var objT = ?? list1.Add(objT); } return list1; } Any idea?

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  • How do i start with Gomoku?

    - by firstTry
    I read about Gomoku that it can be implemented using Minimax and Alpha-Beta Pruning algorithms. So, i read these algorithms and now understand how the game will be solved. But when i sat to down to code, I am facing problem how to approach it. As in , How to design the prototype functions like getNextMove or Max(Move) ? How will the next move searched? Till when should i apply the minimax algorithm. I know i can find the code online, but i want to do it myself. Can anyone please point me in the right direction?

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  • can't get height of object in chrome

    - by Cinaird
    i want to get the height property of a object: thisImage = $('#topContent img').get(index); so long no problem, but then i want to get the height like this: thisImage.height; i thought it was equvivilent to: thisImage.height(); or: thisImage.css("height"); but neither does work for me. And the greatest problem is that thisImage.height; Dose not work in chrome. Have i missed something or is this a known bug? is there another way to get the height in chrome?

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  • Actionscript 3: foreach drawing object in movieclip

    - by Mathias
    Hey, I got a europe map designed in flash (1 movieclip, 1 frame, really simple), which contains the map as drawing objects directly inside the scene and in addition some specific countries as clickable buttons. So far it's working fine. What I need now is to make all the other drawing objects clickable without having to edit and script each object. I'm thinking about something like this (pseudo code): foreach(obj in MovieClip) { if(obj !typeof(Button)) { obj.addEventListener(MouseEvent.MOUSE_DOWN, genericClickListener); } } I just don't know the syntax how to achieve that. Could anybody give me a hint? Thanks, Mathias

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  • 2 ways to create new object by setting property values

    - by Samvel Siradeghyan
    Hi all I have a class Question which has a property Text public class Question { public string Text { get; set; } } Now I wont create on object of this type by giving value to property. I can do that in this two ways: Question q = new Question { Text = "Some question" }; and Question q = new Question() { Text = "Some question" }; Is there any difference between this two cases and if they are the same, why we need both? Thanks.

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  • WPF TreeView binding to a simple object

    - by esse
    I have a simple object as such: public class Info { public string Name {get; set;} public int Count {get; set;} public DateTime TimeStamp {get; set;} } I want to bind a collection of these objects to a WPF TreeView and have the properties on the Info objects show up as sub TreeViewItems, like so: Item 1 Name: Bill Count: 3 TimeStamp: 12/05/2010 09:06:00 AM Item 2 Name: Chris Count: 22 TimeStamp: 11/05/2010 11:34:00 AM Item 3 Name: Toby Count: 1 TimeStamp: 09/05/2010 05:55:00 PM How can I achieve this through XAML?

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